有时限取送混合车辆路径问题的模型及其禁忌搜索算法研究

研究了带时间窗的取送混合车辆路径问题.问题中,每个客户带有取货和送货两个时间窗,每个客户处的取货和送货任务可以通过访问一次全部完成,也可以分两次访问分别完成送货和取货任务.在对该类问题进行描述和取送一体化战略的基础上,建立了有时限取送混合车辆路径问题的数学模型.通过设计一种新的解的表示方法构造了该问题的禁忌搜索算法.实验计算结果表明,用该禁忌搜索算法求解有时限取送混合车辆路径问题,不仅可以取得很好的计算结果,而且收敛速度较快,计算结果也较稳定.     

基于WEB的网络视频监控技术研究

将视频监控与Internet相结合,通过浏览器进行远程监控。使用VFW软件包,通过摄像头实现对视频信号的采集、编码、存储以及视频数据的网络传输;PC机将作为Web服务器在Internet上发布实时监控信息。实现远程用户在不使用第三方插件的情况下使用浏览器实施监控。满足视频应用程序开发的需要。     

旧有建筑外窗节能改造的实用选择

通过对旧有建筑外窗的几种节能改造方法的经济节能比较,建议选择既经济又能达到节能要求的方式。     

在公共场所设置手语服务窗口的可行性探究

随着我国城市化建设的不断进步和完善,城市公共场所也在一定程度上满足了广大人民群众在生活中休闲娱乐的要求。目前,城市公共场所在为聋哑人设置手语服务窗口这一举措未得到普及,使得聋哑群体在公共场所获取信息时存在一定的障碍。论文首先阐述了公共场所设置手语服务窗口的必要性,其次分析了在城市公共服务场所设置手语窗口的现状,最后为公共场所设置手语服务窗口提供了解决方案。     

“破窗效应”在中职教育中的应对措施

"破窗效应"在中职学校的教育教学中具有非常重要的借鉴作用,针对班级管理中出现的各种漏洞需要及时的矫正和修补,以防止职校学生因缺乏正确的判断力而产生的各种行为、思想上的偏差,造成严重的后果。     

Time varying contagion in EMU government bond spreads

We analyze the time varying behavior of pure contagion effects between Economic and Monetary Union (EMU) government bond spreads before and during the subprime mortgage crisis and the EMU debt crisis. By conducting a rolling window analysis, we are able to monitor the evolution of pure contagion effects and the changing influence of exogenous factors over time. Importantly, this is done without an ex-ante specification of the contagion window. Hence, we are able to determine the exact timing of the start and end for the different contagion periods. In contrast to related studies, we use a slightly different definition of contagious events and show that this approach leads to different conclusions about the progression of the EMU debt crisis. First, the main sources of pure contagion in the later phase of the EMU debt crisis appear to be Italy and Spain and not Greece, Ireland and Portugal. Furthermore, we find that substantial contagion effects among EMU government bond spreads (caused by Ireland and Portugal) already arise during the subprime mortgage crisis and not only during the EMU debt crisis, as one might expect.     

The price of sinful behavior window dressing: Cultural embeddedness on cigarette packages and financial reporting quality

Using hand-collected data from China, we examine whether cultural embeddedness on cigarette packages affects corporate financial reporting quality, and further investigate the moderating effect of foreign directors. The findings reveal that firms in provinces with more cultural embeddedness on cigarette packages exhibit significantly higher extent of discretionary accruals. This finding suggests that cultural embeddedness on cigarette packages as a tobacco-related sinful behavior window dressing shapes unethical social atmosphere, elicits unethical managerial behavior, brings out information distortion, and eventually reduces financial reporting quality. Moreover, the positive relation between cultural embeddedness on cigarette packages and discretionary accruals is less pronounced for firms with foreign directors than for their counterparts. Furthermore, our findings are robust to a variety of sensitivity tests using alternative proxies for cultural embeddedness on cigarette packages and financial reporting quality, and further our conclusions still stand after employing the difference-in-difference approach, two-stage least square regression procedure and two-stage Heckman method to address the endogeneity problem. Lastly, pictorial health warnings on cigarette packages are significantly negatively related with country-level smokers, but cultural embeddedness on cigarette packages is significantly positively associated with tobacco consumption at the province level and owner-manager agency costs in China, providing supportive evidence to our findings.     

一种咬尾双二进制Turbo码并行译码方案

针对双二进制Turbo译码使用并行、滑动窗联合译码技术时，其咬尾的编码构造和窗分割导致边界状态值难以获取的问题，提出了一种新咬尾Turbo码并行、滑动窗译码方案——扩展交叠方案。该方案采用了边界状态盲估计和滑动窗状态回溯两种新译码技术。相比于传统的边界状态度量传播方法（又称迭代法），新方法一方面提高了边界状态度量的准确性，从而加快了译码收敛速度，一定程度上减小了高信噪比下的性能损失；另一方面避免了存储前一次译码的迭代度量值，更有利于硬件设计。仿真表明，新方案在64左右的中等窗长下即可消除并行和滑动窗影响，逼近原始无并行无滑动窗译码的性能，且窗长越小，其相较传统迭代法带来的译码性能增益就越明显。该方案具有较好的实用性和应用价值，可以满足5G的高速率、低时延和低存储的数据传输要求。     

一种联合星座和伴随式信息的迭代译码算法

针对构造性的大数逻辑可译低密度奇偶校验（LDPC）码,联合信号星座和伴随式信息,提出一种基于可靠度的迭代大数逻辑译码算法。在校验节点,直接使用伴随式信息进行传递和处理;在变量节点,结合信源端的星座映射和伴随式进行译码信息收集和处理。理论分析和仿真实验结果表明,所提出的算法在保持优良译码性能的同时,具有更低的译码复杂度。     

我国股市指数波浪曲线的时间窗口研究——基于可公度法

以我国上证综合指数波浪曲线的顶位、底部的时间点为研究对象,利用可公度法分析了自1991年以来上证综合指数波浪曲线的特性。研究发现:上证综指波浪曲线的浪顶、浪底的时间窗口序列具有良好的可公度性特征,可公度法在预测股票市场指数波浪曲线的时间窗口方面具有一定精确性。